API Key Validator

Instantly validate API key formats for popular services like Google, AWS, Stripe, and more. Our tool checks the format only - no actual authentication or API calls are made, ensuring your keys stay private.

API Key

API Type (Optional)

API Key Format Reference

Google API Key

Google API keys start with "AIza" followed by 35 characters.

AIza

AWS Access Key ID

AWS Access Key IDs are 20 characters long and start with "AKIA".

AKIA

AWS Secret Access Key

AWS Secret Access Keys are 40 characters long.

(no prefix)

Stripe API Key (Test)

Stripe test API keys start with "sk_test_".

sk_test_

Stripe API Key (Live)

Stripe live API keys start with "sk_live_".

sk_live_

GitHub Personal Access Token

GitHub personal access tokens start with "ghp_" and are 40 characters long.

ghp_

OpenAI API Key

OpenAI API keys start with "sk-" and are 51 characters long.

sk-

Firebase API Key

Firebase API keys follow the same format as Google API keys.

AIza

Twilio Auth Token

Twilio auth tokens are 32 characters long hexadecimal strings.

(no prefix)

MongoDB Connection String

MongoDB connection strings start with "mongodb://" or "mongodb+srv://".

mongodb://

API Key Examples & Patterns

Google API

Used for Google Cloud Platform services

AIzaSyBNLrJhOMz6idD05pzfn5lhA-TAW-mAc-E

Prefix:AIza

Length:39 characters

Pattern:

Starts with AIza followed by 35 characters (alphanumeric, dash, underscore)

AIza[0-9A-Za-z-_]{35}

AWS Access Key ID

AWS IAM access key identifier

AKIAIOSFODNN7EXAMPLE

Prefix:AKIA

Length:20 characters

Pattern:

Starts with AKIA followed by 16 uppercase alphanumeric characters

AKIA[0-9A-Z]{16}

AWS Secret Key

AWS IAM secret access key

wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

Prefix:None

Length:40 characters

Pattern:

40 characters (alphanumeric, forward slash, plus)

[0-9a-zA-Z/+]{40}

Stripe Test API

Stripe test environment API key

sk_test_1234567890abcdefghijklmn

Prefix:sk_test_

Length:32+ characters

Pattern:

Starts with sk_test_ followed by 24+ alphanumeric characters

sk_test_[0-9a-zA-Z]{24,}

Stripe Live API

Stripe production environment API key

sk_live_1234567890abcdefghijklmn

Prefix:sk_live_

Length:32+ characters

Pattern:

Starts with sk_live_ followed by 24+ alphanumeric characters

sk_live_[0-9a-zA-Z]{24,}

OpenAI API

OpenAI API key for GPT and other services

sk-1234567890abcdef1234567890abcdef1234567890abcdef

Prefix:sk-

Length:51 characters

Pattern:

Starts with sk- followed by 48 alphanumeric characters

sk-[0-9a-zA-Z]{48}

GitHub Token

GitHub personal access token

ghp_1234567890abcdef1234567890abcdef12

Prefix:ghp_

Length:40 characters

Pattern:

Starts with ghp_ followed by 36 alphanumeric characters

ghp_[0-9a-zA-Z]{36}

Firebase API

Firebase project API key

AIzaSyBNLrJhOMz6idD05pzfn5lhA-TAW-mAc-E

Prefix:AIza

Length:39 characters

Pattern:

Same format as Google API keys

AIza[0-9A-Za-z-_]{35}

Twilio Auth Token

Twilio authentication token

1234567890abcdef1234567890abcdef

Prefix:None

Length:32 characters

Pattern:

32 hexadecimal characters

[0-9a-f]{32}

MongoDB URI

MongoDB connection string

mongodb+srv://user:password@cluster.mongodb.net/dbname

Prefix:mongodb:// or mongodb+srv://

Length:Variable

Pattern:

Starts with mongodb:// or mongodb+srv:// followed by connection details

mongodb(\+srv)?://.*

Important Notes

These are example formats only - never share real API keys
Some services may change their key formats over time
Always refer to the official documentation for the most up-to-date formats
Store API keys securely using environment variables or secret managers

Features of Our Free API Key Validator

Instant Validation

Check API key formats in real-time. Get immediate feedback on whether your key matches the expected pattern.

Multiple Services

Support for various popular API providers including Google, AWS, Stripe, OpenAI, GitHub, and more.

Privacy First

All validation happens in your browser. No API keys are ever sent to our servers or stored anywhere.

Format Guide

Detailed information about key patterns and requirements for each supported service.

How It Works

Select the API provider from the dropdown

Enter your API key

Get instant format validation results

View detailed format requirements

Best Practices for API Keys

Security

Never share your API keys publicly
Rotate keys regularly for security
Use environment variables to store keys
Implement proper key management
Follow the principle of least privilege

Implementation

Validate key format before making API calls
Use separate keys for development/production
Monitor key usage and set rate limits
Keep keys out of version control
Use key rotation automation when possible

Frequently Asked Questions

Is this tool safe to use with real API keys?

Yes, our validator only checks the format of your API keys. No actual API calls are made, and your keys are never sent to any server or stored anywhere. All validation happens directly in your browser.

What API key formats are supported?

We support format validation for major service providers including Google, AWS, Stripe, OpenAI, GitHub, Firebase, Twilio, and more. The tool checks key length, prefix patterns, and character sets specific to each provider.

Can this tool verify if my API key is valid?

No, this tool only validates the format of API keys. It cannot verify if a key is actually active or authorized. For security reasons, actual validation should be done through the respective service's official channels.

Why use an API key format validator?

Format validation helps catch common mistakes early, saving time during development and debugging. It's especially useful when working with multiple APIs or when documenting key requirements for team members.

Is there a limit to how many keys I can validate?

No, you can validate as many API keys as you need. The tool is completely free and has no usage limits. Since all validation happens in your browser, there are no server-side restrictions.